Hello! As a teenager who just started going vegan, I might be able to offer some advice.

Vegan diets done right are extremely nutritious, likewise doing them wrong can be disastrous. I would recommend searching online for vegan recipes. You can find some delicious vegan recipes that use quorn here. I would recommend that you try and promote vitamin B12, calcium, iron, and zinc. These are some of the nutrients that are difficult to include in vegetarian and vegan diets.

About you worrying on how to transition her slowly, I honestly wouldn't worry about that too much. I know a lot of vegans, including myself, who went from eating meat daily to full vegan overnight. The only issues that happened to me personally were light stomach cramps the first day. Since she was already a vegetarian, the transition shouldn't be as extreme. If you still want to transition her slowly, I would recommend cutting out certain animal products one at a time until none are left.

If you are open to the idea of your daughter learning how to cook, that would make things a lot easier. I make my own meals out of my parent's way and it works great. Of course, this is only if you aren't open to making separate dishes for her.

I've been vegan since 9 and am 15 now, and my health is great! I made a website for vegan and vegan-interested teens, and you may be interested in the information there, where I have meal ideas and health information, etc.

As I say on one of the Q&A questions, studies show nonvegans lack more nutrients than vegans do, so while going vegan should be done thoughtfully, it's not exactly like the alternative is more healthy. Nonvegan diets apparently need more care than most people put into them, so needing to use care as a vegan will hopefully not discourage you. It's not very hard at all once you get used to it!

You're an awesome mom to help her with her goal of being a vegan. Maybe you'll join her someday once you see how easy, healthy and delicious it can be?

Vegans need to eat a mix of fruit, vegetables, legumes, grains and so on.

You don't need a meat substitute necessarily but try and get at least some legumes in the diet (beans, lentils, peas, soy). Try half and half with meat substitutes and new meal ideas and see what works.

Vegan diets have less calories per gram of food, so you need to eat more food. Either large portions, more snacks, also keep in mind that amongst the vegan foods avocados and nuts are more fatty than other plant foods so not a bad idea.